Guðfríður Lilja Grétarsdóttir
- Date of Birth: January 10th, 1972
- Party: Left-Green Movement
- Member of Althingi for the Southwest Constituency since 2009.
- Chairman of the Left Green Movement's parliamentary group 2009-2011.
- Member of the Judicial Affairs and Education Committee since 2012.
- Member of the Environment and Communications Committee since 2011 (Chairman since 2011).
- Member of the the Icelandic Delegation to the Conference of Parlamentarians of the Arctic Region since 2009 (Chairman since 2009).
- Member of the Foreign Affairs Committee 2010-2012.
- Member of the Health Committee 2010-2011.
- Member of the Environment Committee 2009-2011 (Vice-Chairman 2009-2010).
- Member of the Social Affairs and Social Security Committee 2009-2011 (Chairman 2011, and 2009-2010).
- Member of the Althingi Special Committee on Constitutional Affairs 2010-2011.
- Member of the Foreign Affairs Committee 2009.
- Member of the Icelandic delegation to the Nordic Council 2009-2010) Vice-Chairman 2010).
- Member of the EU-Iceland joint Parliamentary Committee 2010-2012.